To determine if an object's velocity is 0.00, one must understand the distinction between speed and velocity, where velocity is a vector with both direction and magnitude. Speed, being the magnitude of velocity, is always a non-negative value, while velocity can be negative depending on direction. The magnitude of a velocity vector can indeed be 0, indicating no movement. Confusion arises when interpreting the length of the velocity vector, which cannot be negative but can be zero. Therefore, an object's velocity is 0.00 when it is at rest, meaning there is no movement.